--系统存储过程
exec sp_databases --查看系统数据库
exec sp_tables --查看系统表
exec sp_rename 'aaa','bbb' --修改表明aaa为bbb
exec sp_rename 'dbo.aaa','col1','col2' --修改表aaa的列col1为col2
select * from sys.objects where type='P' --查询存储过程
--存储过程（简单无参）
use Task_Bogic
go
if(exists (select * from sys.objects where name='proc_test'))
drop proc proc_test
go
create proc proc_test
as
select * from Task_Bogic.dbo.Tnfo where Status=7
go
exec proc_test
--存储过程（带参）
if(OBJECT_ID('proc_paramTest','P') is not null)
drop proc proc_paramTest
go
create proc proc_paramTest(@status int,@hasItem bit)
as
select * from Task_Bogic.dbo.Tnfo where Status=@status and HasCheckitem=@hasItem
go
exec proc_paramTest 7,1;
--存储过程（带参且带通配符[注意：nvarchar(20)这里的20如果没有加，则执行结果不正确，必须加一个长度]）
--1.参数增加通配符
if(OBJECT_ID('proc_para_test','P') is not null)
drop proc proc_para_test
go
create proc proc_para_test(@status int,@title nvarchar(20)='%a%')
as
select * from Task_Bogic.dbo.Tnfo where Status=@status and Title like @title
go
exec proc_para_test 7,'%a%'
--2.拼接通配符
if(OBJECT_ID('proc_para_test','P') is not null)
drop proc proc_para_test
go
create proc proc_para_test(@status int,@title nvarchar)
as
select * from Task_Bogic.dbo.Tnfo where Status=@status and Title like '%'+@title+'%'
go
exec proc_para_test 7,'a'
--带输出参数的存储过程
if(OBJECT_ID('proc_out_paraTest','P') is not null)
drop proc proc_out_paraTest
go
create proc proc_out_paraTest(
@status int,
@priority int out,
@title nvarchar output
)
as
select @status=Status,@priority=Priority,@title=Title from Task_Bogic.dbo.Tnfo where Status=@status and Title like '%'+@title+'%'
go
declare @status int,
@priority nvarchar,
@temp nvarchar;
set @status=7;
set @temp='a'
exec proc_out_paraTest @status,@priority out,@temp output
select @priority,@temp
print @priority+','+@temp
--不从缓存读取的存储过程（每次执行都重新编译执行）
if(object_id('proc_para_test','P') is not null)
drop proc_para_test
go
create proc proc_para_test
with recompile
as
select * from Task_Bogic.dbo.Tnfo where status=7
go
exec proc_para_test;
--加密存储过程
if(object_id('proc_para_test','P') is not null)
drop proc_para_test
go
create proc proc_para_test
with encryption
as
select * from Task_Bogic.dbo.Tnfo where status=7
go
exec proc_para_test
--包含游标的存储过程（暂无）
--if(object_id('proc_para_test','P') is not null)
-- drop proc proc_para_test
--go
--create proc proc_para_test
-- @cursor cursor
--as
--分页存储过程
--row_number分页
if(object_id('proc_para_test','P') is not null)
drop proc proc_para_test
go
create proc proc_para_test
@startIndex int,
@endIndex int
as
select count(*) from Task_Bogic.dbo.Tnfo;
select * from (select row_number() over(order by createTime) as rowId,* from Task_Bogic.dbo.Tnfo) Stu where Stu.rowId between @startIndex and @endIndex
go
exec proc_para_test 2,5
--根据传递的页码和每页显示数量分页
if(object_id('proc_para_test','P') is not null)
drop proc proc_para_test
go
create proc proc_para_test
@pageIndex int,
@pageSize int
as
declare @startRow int,@endRow int
set @startRow=(@pageIndex-1)*@pageSize+1
set @endRow=@pageIndex*@pageSize
select * from (select *,ROW_NUMBER() over(order by CreateTime) as Row_Id from Task_Bogic.dbo.Tnfo) item where item.Row_Id between @startRow and @endRow
go
exec proc_para_test 1,10
--存储过程实例
--斐波那契数列计算
if(OBJECT_ID('proc_test','P') is not null)
drop proc proc_test
go
create proc proc_test
as
declare @count int,@num1 int,@num2 int,@sum int
set @count=1
set @sum=0
set @num1=1
set @num2=1
while @count<=10
begin
set @sum=@num1+@num2;
set @num1=@num2;
set @num2=@sum;
set @count+=1;
end
select @sum
go
exec proc_test
--鸡兔同笼，头30，腿100
if(OBJECT_ID('proc_test','P') is not null)
drop proc proc_test
go
create proc proc_test
as
declare @num1 int,@num2 int
set @num1=1
while @num1<=30
begin
set @num2=30-@num1
if 100=@num1*4+@num2*2
begin
print '兔：'+convert(nvarchar,@num1)+'只,鸡'+convert(nvarchar,@num2)+'只'
end
set @num1+=1
end
go
exec proc_test
--二元一次方程组算法
if(OBJECT_ID('proc_test','P') is not null)
drop proc proc_test
go
create proc proc_test
as
go
exec proc_test
--set nocount on 不再返回行数【但是@@Rowcount仍会计算】，只会提示（命令已成功完成）set nocount off关闭不返回行数（即返回受影响行数）
set nocount on
select * from Tnfo where Status=7
set nocount off
select * from Tnfo where Status=7
--set rowcount 5 设置返回行数（5代表5行），查询数据只能返回5行，和select top 5 一样。使用set rowcount 0,取消设置。
set rowcount 5
select * from Tnfo where Status=7
set rowcount 0
select * from Tnfo where Status=7
--@@rowcount返回行数，这里查询10行，则就是10，一般循环的时候使用，如果@@rowcount不大于0，则没有查询到数据。
select top 10 * from Tnfo
select @@ROWCOUNT
--游标
declare cur_task cursor for --定义游标
select * from [Task_Bogic].[dbo].[Tnfo] where status=7 and title like '%a%'
open cur_task --打开游标
fetch next from cur_task --获取第一条数据
while @@fetch_status=0 --如果存在数据
begin
fetch next from cur_task --查询下一条
end
close cur_task --关闭游标
deallocate cur_task --释放游标
go
--游标使用
select id,createTime from [Task_Bogic].[dbo].[Tnfo] where status=7 and title like '%a%'
declare @id uniqueidentifier,@cur_createTime datetime,@num int
set @num=-1
declare cur_task cursor for --定义游标
select id,createTime from [Task_Bogic].[dbo].[Tnfo] where status=7 and title like '%a%'
open cur_task --打开游标
fetch next from cur_task into @id,@cur_createTime --获取第一条数据
while @@fetch_status=0 --如果存在数据
begin
print convert(nvarchar(100),@id)+'-----'+convert(nvarchar(100),@cur_createTime,120)
update [Task_Bogic].[dbo].[Tnfo] set CreateTime=DATEADD(DAY,@num,GETDATE()) where Id=@id
fetch next from cur_task into @id,@cur_createTime --查询下一条
set @num-=1
end
close cur_task --关闭游标
deallocate cur_task --释放游标
go
